Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Age-associated predicted curves for d′ 2-back numbers. Average predicted curve and two 95% confidence bands, one accounting only for the fixed effects part and another one adding the variation of the random effects. Stratified results by sex are provided.
